Defensive publication

ABSTRACT

THICKENED, UNSATURATED POLYESTERS OF 2,2,4-TRIMETHYL1,3-PENTANEDIOL OR NEOPENTYL GLYCOL A POLYHYDRIC ALCOHOL, AND MALEIC ACID, WHEN REACTED WITH STYRENE OR THE LIKE, PARTICULARLY IN THE PRESENCE OF LEVELLING RESINS SUCH AS CELLULOSE ACETATE BUTYRATE, PRODUCE MOLDED ARTICLES OF GOOD SURFACE APPEARANCE AND A HIGH DEGREE OF PIGMENT HOMOGENIETY. THE UNSATURATED POLYESTERS HAVE A NUMBER AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 1,000 TO ABOUT 4,000, THEIR GLYCOL CONSTITUENTS COMPRISE AT LEAST ABOUT 30 PERCENT BY WEIGHT OF 2,2,4-TRIMETHYL-1,3-PENATANEDIOL OR NEOPENRY GLYCOL OR MIXTURES THEEOF, AND THE POLYHYDRIC ALCOHOL CONSISTUENT COMPRISES ABOUT 1 TO 20 MOLE PERCENT OF THE GLYCOL CONSISTUENT. THE POLYHYDRIC ALCOHOL MAY BE NATERYTHRITOL, TRIMETHYLOLPROPANE, TRIMETHYLOLETHANE, GLYCERINE, MANNITOL, OR THE LIKE.

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED JANUARY 22, 1974i T9i8,011 MOLDING RESIN COMPOSITIONS William W. Blount, Jr., 1129 Oaklcaf Drive 37663;

Roger H. Calendine, 217 Elmhurst Drive 37663; and

James L. Suggs, 4241 Maplewood St. 37660, all of Kingsport, Tenn.

Filed Oct. 2, 1972, Scr. No. 293,899 Int. Cl. C08b 21/08; C08g 39/10 US. Cl. 260-16 No Drawing. 10 Pages Specification Thickened, unsaturated polyesters of 2,2,4-trimethyl- 1,3-pentanediol or neopentyl glycol, a polyhydric alcohol, and maleic acid, when reacted With styrene or the like, particularly in the presence of leveling resins such as cellulose acetate butyrate, produce molded articles of good surface appearance and a high degree of pigment homogeneity. The unsaturated polyesters have a number average molecular weight of from about 1,000 to about 4,000, their glycol constituents comprise at least about 30 percent by Weight of 2,2,4-trimethyl-1,3-pentanediol or neopentyl glycol or mixtures thereof, and the polyhydric alcohol constituent comprises about 1 to 20 mole percent of the glycol constituent. The polyhydric alcohol may be pcntaerythritol, trimethylolpropane, trimethylolethane, glycerine, mannitol, or the like. 

